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Bike wont idle without choke

2002 1200 Custom Sportster, starts fine with choke out and I let it warm up but when I throttle it the engine stops even with the choke out, when I push the choke in the engine stops, it wont idle. I did this whole proses again with the air filter off but it didn't help I got the same result. Cant even ride it to the mechanic.

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You need to take your carb off give it as good cleaning. also check your intake gaskets where the manifold joins the jugs and the black rubber one where the carb joins the manifold. You def have air/fuel problem going on. also check your vscume hose to the carb but im thinking that is not it.

Posted on Oct 06, 2009

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Intake leak or petcock problem

Posted on Dec 30, 2009

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Why does it idle high after it warms up?


It is designed to do that with the enrichener on even a small amount.

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2005 Harley Davidson 1200 Custom Sportster Stalls at Lights and Stop Signs


4700 not a lot of miles. This motorcycle needs to run. It will be rough until you can get the carb cleaned. I would keep doing what you have been doing for a while. After a couple hundred miles if it doesn't improve, you might want to consider having the Harley shop give it a good tune up. Check the plugs ...

May 28, 2013 | 2005 Harley Davidson XL 1200 C Sportster...

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2003 harley 1200 custom sportster with 50 miles strats up fine with choke pulled out. once engine is warm and choke is pushed in 50% bike stalls out. have repalaced gas, spark plugs and just took apart...


A 2003 model with only 50 miles?? Wow....well,since youve already taken the carb apart and cleaned it,did you hook up the vaccum line for the VOES switch on the intake manifold? If so,..when you get the bike running,..spray some brake clean around the intake where it bolts to the heads.If the idle picks up,or starts to sputter,..youve got leaking intake gaskets. Which is a good possibility on a bike that old with that few miles on it.The choke essentailly adds more fuel to the motor,and by what your saying,the bike is obviously running lean. Also,...im ASSUMING that you have fresh gas in it,and the petcock is turned on.

Sep 25, 2012 | 2003 Harley Davidson XL 1200 C Sportster...

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Harley wont start with choke on,but can start it with choke off


Hi Cully, if you have a carburator the usual suspects are:
1. Damaged or restricted fuel tank venting system (gas cap).
2. Inlet system air leak.
3. Vacuum piston malfunction.
4. Accelerator pump leaking or no output.
5. Plugged bowl vent.
6. Fuel level (float chamber) too low.
7. Restriccted fuel supply passages.
8. Plugged jets or passages.
9. Worn or damaged needle or needle jet.
10. Enrichner valve not seated or leaking.
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Jun 03, 2012 | 2001 Harley Davidson XL 1200 C Sportster...

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I have a 2005 harley davidson sportster xl 1200 custom. after bike is at normal operating temp.when i stop for redlight or stop sign, bike idles to fast.i can let out on clutch little bit and it will slow...


If the carb is adjusted correctly, the engine will not idle without the choke when cold. I will usually take at least 3 to 5 miles of riding to get the engine warm enough to idle by itself without the choke. If your bike is a full operating temperature, it should idle at about 1000 RPM. If it's idling higher than this, you need to slow it down a bit.

Remove the air filter cover and look at the top right side of the carb. You'll see a screw there . This is the throttle stop screw. Turn the screw counterclockwise to lower the idle speed to 1000 RPM or so. Blip the throttle and let it settle back to idle. Reset it if necessary. Once set, put the air cleaner cover hand on.

Mar 14, 2011 | 2005 Harley Davidson XL 1200 C Sportster...

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I have a 2003 ttr225 I can get the bike to start with the choke on ihave to let it warm up for an extremly long time before I can push in the choke . once the bike is warm and I hit the throttle hard ,...


Sounds like the idle circuit in the carb is restricted. The engine is running on the choke only. When the engine reaches a certain temp the fuelthat does get is more readily burned allowing you to back off the choke. The choke probsbly can't be completely opened? right? Fuel quality is also something to consider Oil content in fuel affects combustion temps and volatility. _good luck_Ned_



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1 Answer

Bike wont kick start or idle , it will coast


first drain the carby, then set your air mixture screw 2 turns out, from the fully turned in position. The starting proceedure is as follows, when the engine is COLD, turn on fuel, pull on the choke fully, and kick the engine over. DO NOT use any throttle, when the engine is cold, and the choke is on. Remember Choke on, NO throttle.
When warm, no choke, and a little throttle when kicking.

May 12, 2010 | 2003 kawasaki KX 125

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Idles ok with choke out but wont run any higher


the carbereter jets are blocked up,, strip it out and clean them out
but dont go pokeing a bit of wire into any jets or you will distroy them
if jets are blocked the bike will normaly only run with full choke on

Feb 21, 2010 | 2000 Harley Davidson XL 1200 C Sportster...

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2006 Suzuki Boulevard C50 engine dies


Even though you probably don't have that many miles on the bike, or if you do have a lot riding time on it, it sounds to me like you need a valve adjustment. That's a high reving bike for that engine that works pretty hard so you might have 1 - 3 loose valves.

Dec 07, 2009 | 2005 Suzuki Boulevard C50

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